Bain Capital is the heart of Romney’s fortune: it was the financial engine that created it. The mantra of his campaign is that he was a businessman who created tens of thousands of jobs, and Bain certainly did bring useful operational skills to many companies it bought. But his critics point to several cases where Bain bought companies, loaded them with debt, and paid itself extravagant fees, thereby bankrupting the companies and destroying tens of thousands of jobs.

Come August, Romney, with an estimated net worth as high as $250 million (he won’t reveal the exact amount), will be one of the richest people ever to be nominated for president. Given his reticence to discuss his wealth, it’s only natural to wonder how he got it, how he invests it, and if he pays all his tas on it.